Which of the following diseases is considered zoonotic?

Ringworm is considered a zoonotic disease because it can be transmitted between animals and humans. Zoonotic diseases are those that can be transferred from animals to humans, and ringworm is a fungal infection that can affect both species. It spreads through skin-to-skin contact as well as through contaminated surfaces, making it a significant concern in settings where humans and animals interact, such as farms and veterinary clinics.

In contrast, while foot-and-mouth disease primarily affects livestock and can cause significant agricultural productivity losses, it does not typically infect humans. Bovine tuberculosis is mainly a disease of cattle but can be transmitted to humans, primarily through the consumption of unpasteurized dairy products from infected animals, making it less straightforward as a zoonotic disease. Chronic wasting disease, affecting deer and elk, is not known to infect humans currently, although it's a concern due to the potential for transmission to other species in the future. Therefore, ringworm stands out as the clear choice for a disease known for its zoonotic properties.